I have a custom yocto image with a custom install script that involves u-boot ums command to put the eMMC into USB mass storage mode, and writing imx-boot at offset 32k on the block device.
It seems like this wasn’t working, it was always running the old original u-boot out of the boot0 eMMC hardware partition. So I tried running
mmc partconf 0 0 0 0 to see if that would cause it to run the u-boot out of the user partition.
Since I did that, it seems to be completely bricked. It does not boot any u-boot, I do not see any console output, and it does not go into serial download mode. I tried the recovery procedure of shorting the serial download mode pins on the Ixora carrier, but it still does not go into recovery mode, does not show up as USB HID device (which worked before, the micro-USB jumper is removed). It also will not boot off of a micro SD card. Is there any way to recover this SOM? They are apparently difficult to replace. I don’t think that changing the emmc partconf settings should prevent the SOM from going into serial download mode or from booting from other devices.